Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3e6151eaec80a8…

MALICIOUS

PDF

47.8 KB Created: 2020-08-19 13:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022aae6e089ab91e8bf4b5b4cfb054b2 SHA-1: fff4c903400f69adcda0d33877605cf992777074 SHA-256: 8d3e6151eaec80a8074d1d7fd411c7191a3a098520147992346b021cdbbd70fc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the text 'Beautiful love quotes with images' and the malicious URL, suggesting a lure to entice users to click. The heuristic firings confirm the presence of malicious redirector links and a link farm within the PDF structure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=beautiful+love+quotes+with+images
    • http://kabapepi.spiritualresearchnetwork.com/uploads/1/3/2/8/132815123/c13473d951cc6.pdf
    • http://files.mattatkinsonart.com/uploads/1/3/0/8/130874642/wutirujer-rexej.pdf
    • http://files.bodylistener-hk.com/uploads/1/3/1/4/131437508/1471693.pdf
    • http://files.ballerinabites.org/uploads/1/3/2/6/132682676/9850100.pdf
    • https://cdn.shopify.com/s/files/1/0430/6078/9409/files/buziwowibijobok.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/jutetonudevudisurabiton.pdf
    • https://cdn.shopify.com/s/files/1/0432/7833/6165/files/88312982954.pdf
    • https://cdn.shopify.com/s/files/1/0434/6127/9896/files/negakomutudapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63537272249.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/13165553566.pdf
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/5579793948.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/galofomu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/jarufogakeba.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d62.bin
c0475e1448ba618beccf94290a968d101980427c660eb6b1cb896ba6c6a56213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D62 5412 bytes
font_01_sfnt_off00008fc6.bin
ec4192a00f9dc95121c6dd7ab033078609e95ebfdac1c9670d5f5217c9b9614a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC6 10292 bytes

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